1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Hunter-Best [27]
2 years ago
14

I'LL GIVE BRAINLIST

Biology
1 answer:
hichkok12 [17]2 years ago
4 0
Wi-Fi technology has its origins in a 1985 ruling by the U.S. Federal Communications Commission that released the bands of the radio spectrum at 900 megahertz (MHz), 2.4 gigahertz (GHz), and 5.8 GHz for unlicensed use by anyone. Technology firms began building wireless networks and devices to take advantage of the newly available radio spectrum, but without a common wireless standard the movement remained fragmented, as devices from different manufacturers were rarely compatible. Eventually, a committee of industry leaders came up with a common standard, called 802.11, which was approved by the Institute of Electrical and Electronics Engineers (IEEE) in 1997. Two years later a group of major companies formed the Wireless Ethernet Compatibility Alliance (WECA, now the Wi-Fi Alliance), a global nonprofit organization created to promote the new wireless standard. WECA named the new technology Wi-Fi. Subsequent IEEE standards for Wi-Fi have been introduced to allow for greater bandwidth. The original 802.11 standard allowed a maximum data transmission rate of only 2 megabits per second (Mbps); 802.11n, introduced in 2007, has a maximum rate of 600 Mbps.

Under the IEEE Wi-Fi standards, the available frequency bands are split into several separate channels. These channels overlap in frequency, and therefore Wi-Fi uses channels that are far apart. Within each of these channels, Wi-Fi uses a “spread spectrum” technique in which a signal is broken into pieces and transmitted over multiple frequencies. Spread spectrum enables the signal to be transmitted at a lower power per frequency and also allows multiple devices to use the same Wi-Fi transmitter. Because Wi-Fi signals are often transmitted over short distances (usually less than 100 metres [330 feet]) in indoor environments, the signal can reflect off walls, furniture, and other obstacles, thus arriving at multiple time intervals and causing a problem called multipath interference. Wi-Fi reduces multipath interference by combining three different ways of transmitting the signal (in a method developed by Australian engineer John O’Sullivan and collaborators). The popularity of Wi-Fi has grown steadily. Wi-Fi allows local area networks (LANs) to operate without cables and wiring, making it a popular choice for home and business networks. Wi-Fi can also be used to provide wireless broadband Internet access for many modern devices, such as laptops, smartphones, tablet computers, and electronic gaming consoles. Wi-Fi-enabled devices are able to connect to the Internet when they are near areas that have Wi-Fi access, called “hot spots.” Hot spots have become common, with many public places such as airports, hotels, bookstores, and coffee shops offering Wi-Fi access. Some cities have constructed free citywide Wi-Fi networks. A version of Wi-Fi called Wi-Fi Direct allows connectivity between devices without a LAN. Radiotelegraphy, radio communication by means of Morse Code or other coded signals. The radio carrier is modulated by changing its amplitude, frequency, or phase in accordance with the Morse dot-dash system or some other code. At the receiver the coded modulation is recovered by an appropriate demodulator and the code groups are converted into the corresponding symbols. In many instances the symbols are generated by a computer and modem rather than with a manual telegraph key.
You might be interested in
Which statement about predator and prey adaptations is correct?
Alexeev081 [22]
I’m almost positive it’s C cause speed is very common within predator, and prey species predators to catch the prey and prey to try and survive the predators.
7 0
2 years ago
A chemical imbalance in the blood can cause the heart to stop pumping blood, which in turn will cause other tissues and organs t
tatiyna

Answer;

B) all levels of organization within an organism are interdependent.

Explanation;

-The biological levels of organization of living things arranged from the simplest to most complex are: organelle, cells, tissues, organs, organ systems, organisms, populations, communities, ecosystem, and biosphere.

The levels of organization are dependent on each other, for example, the organ systems rely on each other for many different things and cannot function without the other. e.g. The nervous and endocrine systems control the activities of the digestive, excretory, circulatory and respiratory systems. Organ systems need to work together to maintain homeostasis in the body.

6 0
3 years ago
Read 2 more answers
What are the types of wastewater?
eimsori [14]

The types are Blackwater, Graywater and Yellow water.

You can find two types of wastewater: household sewage and wastewater

7 0
2 years ago
Read 2 more answers
The nature of scientific investigation
evablogger [386]

Answer: make systematic observations and carefully collect relevant evidence.Then they use logical reasoning and some imagination to develop hypotheses and explanations.

//Give thanks if helpful :)//

Explanation:

6 0
3 years ago
What does it mean to lower one’s carbon footprint?
bogdanovich [222]
C) to lessen his/her personal introduction of atomspheric CO2
5 0
3 years ago
Other questions:
  • What are the parts that interact to form a whole ecosystem
    11·1 answer
  • Without redox reactions, NADH cannot unload its electrons and the process of__ will be shut down
    14·2 answers
  • Examples of Majo
    8·1 answer
  • How many chromosomes will be present in each of the new cells after the cell<br> divides?
    6·2 answers
  • Which type of molecule stores the main source of energy used by animals?
    12·1 answer
  • Help please!! (3 points)
    14·1 answer
  • In what age did the T Rex exist
    15·2 answers
  • The question is in the screenshot
    10·1 answer
  • Name 3 sources of CO2.
    11·1 answer
  • Huryyyy
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!